Merge pull request #18783 from sl-sergei:fix_conv1d

Add support for Conv1D on OpenCV backend

* Add support for Conv1D on OpenCV backend

* disable tests on other targets/backends

* Fix formatting

* Restore comment

* Remove unnecessary flag and fix test logic

* Fix perf test

* fix braces

* Fix indentation, assert check and remove unnecessary condition

* Remove unnecessary changes

* Add test cases for variable weights and bias

* dnn(conv): fallback on OpenCV+CPU instead of failures

* coding style

modules/dnn/perf/perf_convolution3d.cpp

@@ -46,7 +46,7 @@ struct Conv3DParamID
         CONV_100 = 16,
         CONV_LAST = sizeof(testConvolution3DConfigs) / sizeof(testConvolution3DConfigs[0])
     };
-    int val_;                                                                  \
+    int val_;
     Conv3DParamID(int val = 0) : val_(val) {}
     operator int() const { return val_; }
     static ::testing::internal::ParamGenerator<Conv3DParamID> all()
@@ -59,7 +59,7 @@ struct Conv3DParamID
         Conv3DParamID v_[NUM]; for (int i = 0; i < NUM; ++i) { v_[i] = Conv3DParamID(i); } // reduce generated code size
         return ::testing::ValuesIn(v_, v_ + NUM);
     }
-};                                                                                  \
+};
 static inline void PrintTo(const Conv3DParamID& v, std::ostream* os)
 {
     CV_Assert((int)v >= 0); CV_Assert((int)v < Conv3DParamID::CONV_LAST);